Also, in both the BCG and IE Matrices, the size of each circle repre­sents the percentage of sales contribution of each division, and pie slices reveal the percentage of profit contribution of each division. The IE Matrix is similar to the BCG Matrix in that both tools involve plotting a firm’s divisions in a schematic diagram this is why they are both called portfolio matrices. The Internal-External (IE) Matrix positions an organization’s various divisions (segments) in a nine-cell display, illustrated in Figure 6-10.